US2014761A - Process for the manufacture of solutions from cellulose - Google Patents
Process for the manufacture of solutions from cellulose Download PDFInfo
- Publication number
- US2014761A US2014761A US492103A US49210330A US2014761A US 2014761 A US2014761 A US 2014761A US 492103 A US492103 A US 492103A US 49210330 A US49210330 A US 49210330A US 2014761 A US2014761 A US 2014761A
- Authority
- US
- United States
- Prior art keywords
- cellulose
- wood
- solutions
- manufacture
- pulp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920002678 cellulose Polymers 0.000 title description 19
- 239000001913 cellulose Substances 0.000 title description 17
- 238000000034 method Methods 0.000 title description 12
- 238000004519 manufacturing process Methods 0.000 title description 6
- 239000002023 wood Substances 0.000 description 18
- 235000010980 cellulose Nutrition 0.000 description 17
- 239000000126 substance Substances 0.000 description 12
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 11
- 239000000463 material Substances 0.000 description 11
- 239000000203 mixture Substances 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 5
- 230000001413 cellular effect Effects 0.000 description 5
- 229920000297 Rayon Polymers 0.000 description 4
- 238000005406 washing Methods 0.000 description 4
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 3
- 235000011613 Pinus brutia Nutrition 0.000 description 3
- 241000018646 Pinus brutia Species 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 229910021653 sulphate ion Inorganic materials 0.000 description 3
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- DBNPDRYVYQWGFW-UHFFFAOYSA-N N.[Cu]=O Chemical compound N.[Cu]=O DBNPDRYVYQWGFW-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 229920003086 cellulose ether Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
Definitions
- alkali treated celluloses can also be advantageously used for making solutions provided the raw wood material used as a basis be of a perfect uniform nature, say for example a well-barked fir-wood which is then worked up into a good bleachable cellular substance or cellulose in the manner already known.
- the new process can, for example, be carried out in the following manner:-
- the wood intended for producing the substance is carefully sorted, so that, for example, only pure pine or only pure fir-wood is used.
- the pure type of wood thus obtained is (when wellbarked and disintegrated) boiled with a 5-per cent sodium hydroxide solution for from twelve to fifteen hours at about 170 in a closed container.
- the soda cellulose thus obtained is then washed, bleached with about 7.0% C12 in the form of sodium hypochlorite, then washed, freed from acid and again washed.
- the material is then brought into the form of pasteboard and dried and can then be used directly for the preparation of cellulose solutions or it can first be converted into the cellulose compounds to be brought into solution (cellulose esters or ethers etc.).
- the moulded tissues formed from this viscose are fully equal in value in their properties to the tissues produced from sulfite cellulose according 20 to the same dissolution process.
Landscapes
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Paper (AREA)
Description
Patented Sept. 17, 1935 UNITED STATES PATENT OFFICE PROCESS FOR THE MANUFACTURE OF SOLUTIONS FROM CELLULOSE No Drawing. Application October 29, 1930, Serial No. 492,103. In Germany December 5, 1929 2 Claims.
For the production of cellulose solutions hitherto use has been made exclusively of cotton, cotton-lint or cellular sulphite substances. The sulphate or soda cellular substance or cellulose 5 so highly esteemed for many substances has hitherto not been suitable for solutions.
Now it has been found that the reason for the uselessness of the said soda or sulphate substances for the manufacture of solutions from cellulose or cellulose compositions is attributable to the lack of uniformity in the composition of these cellular substances, which is due to the fact that for the soda cellular substances of the commercial type there are used as initial raw material, only mixtures of different kinds of wood, preferably of pine and fir types. This lack of uniformity in the composition of the substance gives rise to a varying behaviour of the different fibrous ingredients of the substance in relation to the chemical reactions, from which there then results imperfect solution, had filtration and inferior final products.
Experiments have shown that alkali treated celluloses can also be advantageously used for making solutions provided the raw wood material used as a basis be of a perfect uniform nature, say for example a well-barked fir-wood which is then worked up into a good bleachable cellular substance or cellulose in the manner already known.
Furthermore, when preparing the wood and also in the preparation of the solutions the usual procedure may be observed. In this way there is also obtained from the soda or sulphate cellulose solutions, for example copper-oxide ammonia cellulose, viscose or cellulose acetate, which may be regarded as of equal value when compared with those obtained from sulphite cellulose.
The new process can, for example, be carried out in the following manner:-
40 The wood intended for producing the substance is carefully sorted, so that, for example, only pure pine or only pure fir-wood is used. The pure type of wood thus obtained is (when wellbarked and disintegrated) boiled with a 5-per cent sodium hydroxide solution for from twelve to fifteen hours at about 170 in a closed container. The soda cellulose thus obtained is then washed, bleached with about 7.0% C12 in the form of sodium hypochlorite, then washed, freed from acid and again washed. The material is then brought into the form of pasteboard and dried and can then be used directly for the preparation of cellulose solutions or it can first be converted into the cellulose compounds to be brought into solution (cellulose esters or ethers etc.).
In order, for example, to convert the material 5 into viscose it is dipped in excess of sodium hydroxide solution of 18% strength, after which the lye is pressed off until the mass shows threetimes the original weight in cellulose. The material saturated with alkali is disintegrated, sub- 10 jected to the usual prior-ripening medium and then subjected to a sulphidizing by means of carbon disulphide (30%) and is then brought into solution with the aid of sodium hydroxide solution and water. The dissolving process takes 15 place in a perfectly satisfactory manner, the viscose obtained being perfectly clear.
The moulded tissues formed from this viscose are fully equal in value in their properties to the tissues produced from sulfite cellulose according 20 to the same dissolution process.
What I claim and desire to secure by Letters Patent of the United States is:-
1. In a process of manufacturing high grade solutions of cellulosic material from cellulose 25 produced from alkaline pulping processes, separating from raw wood material consisting of a mixture of woods a single wood to obtain one wood completely freed from other woods, thoroughly barking the said wood, reducing the 30 said one wood to pulp in an alkaline medium only, washing the pulp, treating the washed pulp with bleaching material, washing the pulp thus treated by the foregoing procedure, converting the resulting washed cellulosic material directly 35 into a soluble cellulosic substance.
2. In a process of manufacturing high grade solutions of cellulosic material from cellulose produced from alkaline pulping processes, separating one wood from raw wood material-con- 40 taining a mixture of Woods, the said one wood being of a group consisting of fir and pine, and
thereby obtaining the said one wood completely freed from other woods, thoroughly barking the said one wood, reducing the said one wood to 45 pulp in an alkaline medium only, washing the pulp, treating the washed pulp with bleaching material, washing the pulp thus treated by the foregoing procedure, converting the resulting washed cellulosic material directly into a soluble cellulosic substance.
OTTO FAUST
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2014761X | 1929-12-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2014761A true US2014761A (en) | 1935-09-17 |
Family
ID=7965962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US492103A Expired - Lifetime US2014761A (en) | 1929-12-05 | 1930-10-29 | Process for the manufacture of solutions from cellulose |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2014761A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9274077B2 (en) | 2011-05-27 | 2016-03-01 | Genapsys, Inc. | Systems and methods for genetic and biological analysis |
| US9399217B2 (en) | 2010-10-04 | 2016-07-26 | Genapsys, Inc. | Chamber free nanoreactor system |
| US9434983B2 (en) | 2011-05-27 | 2016-09-06 | The Board Of Trustees Of The Leland Stanford Junior University | Nano-sensor array |
| US9533305B2 (en) | 2010-10-04 | 2017-01-03 | Genapsys, Inc. | Systems and methods for automated reusable parallel biological reactions |
| US9809852B2 (en) | 2013-03-15 | 2017-11-07 | Genapsys, Inc. | Systems and methods for biological analysis |
| US9822401B2 (en) | 2014-04-18 | 2017-11-21 | Genapsys, Inc. | Methods and systems for nucleic acid amplification |
| US9945807B2 (en) | 2010-10-04 | 2018-04-17 | The Board Of Trustees Of The Leland Stanford Junior University | Biosensor devices, systems and methods therefor |
| US10093975B2 (en) | 2011-12-01 | 2018-10-09 | Genapsys, Inc. | Systems and methods for high efficiency electronic sequencing and detection |
| US10125393B2 (en) | 2013-12-11 | 2018-11-13 | Genapsys, Inc. | Systems and methods for biological analysis and computation |
| US10544456B2 (en) | 2016-07-20 | 2020-01-28 | Genapsys, Inc. | Systems and methods for nucleic acid sequencing |
| US10900075B2 (en) | 2017-09-21 | 2021-01-26 | Genapsys, Inc. | Systems and methods for nucleic acid sequencing |
-
1930
- 1930-10-29 US US492103A patent/US2014761A/en not_active Expired - Lifetime
Cited By (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9945807B2 (en) | 2010-10-04 | 2018-04-17 | The Board Of Trustees Of The Leland Stanford Junior University | Biosensor devices, systems and methods therefor |
| US9399217B2 (en) | 2010-10-04 | 2016-07-26 | Genapsys, Inc. | Chamber free nanoreactor system |
| US10539527B2 (en) | 2010-10-04 | 2020-01-21 | The Board Of Trustees Of The Leland Stanford Junior University | Biosensor devices, systems and methods for detecting or analyzing a sample |
| US9533305B2 (en) | 2010-10-04 | 2017-01-03 | Genapsys, Inc. | Systems and methods for automated reusable parallel biological reactions |
| US10472674B2 (en) | 2010-10-04 | 2019-11-12 | Genapsys, Inc. | Systems and methods for automated reusable parallel biological reactions |
| US10100356B2 (en) | 2010-10-04 | 2018-10-16 | Genapsys, Inc. | Systems and methods for automated reusable parallel biological reactions |
| US10260095B2 (en) | 2011-05-27 | 2019-04-16 | Genapsys, Inc. | Systems and methods for genetic and biological analysis |
| US9434983B2 (en) | 2011-05-27 | 2016-09-06 | The Board Of Trustees Of The Leland Stanford Junior University | Nano-sensor array |
| US10059982B2 (en) | 2011-05-27 | 2018-08-28 | The Board Of Trustees Of The Leland Stanford Junior University | Nano-sensor array |
| US11155865B2 (en) | 2011-05-27 | 2021-10-26 | Genapsys, Inc. | Systems and methods for genetic and biological analysis |
| US11021748B2 (en) | 2011-05-27 | 2021-06-01 | Genapsys, Inc. | Systems and methods for genetic and biological analysis |
| US10787705B2 (en) | 2011-05-27 | 2020-09-29 | Genapsys, Inc. | Systems and methods for genetic and biological analysis |
| US9274077B2 (en) | 2011-05-27 | 2016-03-01 | Genapsys, Inc. | Systems and methods for genetic and biological analysis |
| US10266892B2 (en) | 2011-05-27 | 2019-04-23 | Genapsys, Inc. | Systems and methods for genetic and biological analysis |
| US10612091B2 (en) | 2011-05-27 | 2020-04-07 | Genapsys, Inc. | Systems and methods for genetic and biological analysis |
| US10494672B2 (en) | 2011-05-27 | 2019-12-03 | Genapsys, Inc. | Systems and methods for genetic and biological analysis |
| US9926596B2 (en) | 2011-05-27 | 2018-03-27 | Genapsys, Inc. | Systems and methods for genetic and biological analysis |
| US10093975B2 (en) | 2011-12-01 | 2018-10-09 | Genapsys, Inc. | Systems and methods for high efficiency electronic sequencing and detection |
| US11286522B2 (en) | 2011-12-01 | 2022-03-29 | Genapsys, Inc. | Systems and methods for high efficiency electronic sequencing and detection |
| US10570449B2 (en) | 2013-03-15 | 2020-02-25 | Genapsys, Inc. | Systems and methods for biological analysis |
| US9809852B2 (en) | 2013-03-15 | 2017-11-07 | Genapsys, Inc. | Systems and methods for biological analysis |
| US10125393B2 (en) | 2013-12-11 | 2018-11-13 | Genapsys, Inc. | Systems and methods for biological analysis and computation |
| US10533218B2 (en) | 2014-04-18 | 2020-01-14 | Genapsys, Inc. | Methods and systems for nucleic acid amplification |
| US9822401B2 (en) | 2014-04-18 | 2017-11-21 | Genapsys, Inc. | Methods and systems for nucleic acid amplification |
| US11332778B2 (en) | 2014-04-18 | 2022-05-17 | Genapsys, Inc. | Methods and systems for nucleic acid amplification |
| US10544456B2 (en) | 2016-07-20 | 2020-01-28 | Genapsys, Inc. | Systems and methods for nucleic acid sequencing |
| US10900075B2 (en) | 2017-09-21 | 2021-01-26 | Genapsys, Inc. | Systems and methods for nucleic acid sequencing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US1860432A (en) | Process of lowering the solution viscosity of cellulose fiber | |
| US2014761A (en) | Process for the manufacture of solutions from cellulose | |
| US1960551A (en) | Cellulosic products and method of making | |
| US2625474A (en) | Acid-alkali process for the preparation of cellulose fibers | |
| US2159676A (en) | Process of producing viscose | |
| US2138014A (en) | Preparation of viscose sirup | |
| GB501492A (en) | Process for the manufacture of artificial textile fibres | |
| US2106111A (en) | Manufacture of alkali cellulose | |
| US1842689A (en) | Process of treating cellulose fiber and product of same | |
| US2234626A (en) | Manufacture of viscose solutions | |
| US1653124A (en) | Interrelated pulp-refining and viscose process | |
| USRE19280E (en) | Viscose and process for making | |
| US1700596A (en) | Composition for conversion into cellulose derivatives and process of preparing same | |
| US3031371A (en) | Paper of improved strength | |
| US2112576A (en) | Preparation of cellulose xanthate solutions | |
| US2174894A (en) | Process of swelling cellulose fiber sheets | |
| US1792254A (en) | Cellulose composition and process of making molded products therefrom | |
| US975387A (en) | Method of treating bagasse. | |
| US2057163A (en) | Preparation of solutions of hydroxy-cellulose ethers | |
| US2064118A (en) | Processes of producing rayon | |
| US2028846A (en) | Cellulose pulp for esterification purposes and processing of same | |
| US2992155A (en) | Process for manufacturing rayon pulp of high purity from bagasse | |
| CS225129B2 (en) | The production of alkalicellulose | |
| US2536047A (en) | Alkaline digestion of cottonseed hull bran | |
| US1822126A (en) | Method of preparing sulphite pulp for filaments and films |